22685140 has 24 divisors (see below), whose sum is σ = 50441832. Its totient is φ = 8540160.

The previous prime is 22685137. The next prime is 22685147. The reversal of 22685140 is 4158622.

It can be written as a sum of positive squares in 4 ways, for example, as 4177936 + 18507204 = 2044^2 + 4302^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22685099 and 22685108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22685147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33021 + ... + 33700.

It is an arithmetic number, because the mean of its divisors is an integer number (2101743).

Almost surely, 2^22685140 is an apocalyptic number.

22685140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22685140 is an abundant number, since it is smaller than the sum of its proper divisors (27756692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22685140 is a wasteful number, since it uses less digits than its factorization.

22685140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66747 (or 66745 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 22685140 is about 4762.8919786197. The cubic root of 22685140 is about 283.0830207550.

The spelling of 22685140 in words is "twenty-two million, six hundred eighty-five thousand, one hundred forty".